diff options
Diffstat (limited to 'arch/arm64/include/asm/page.h')
| -rw-r--r-- | arch/arm64/include/asm/page.h | 23 |
1 files changed, 16 insertions, 7 deletions
diff --git a/arch/arm64/include/asm/page.h b/arch/arm64/include/asm/page.h index 46bf66628b6a..22b16232bd60 100644 --- a/arch/arm64/include/asm/page.h +++ b/arch/arm64/include/asm/page.h @@ -28,17 +28,26 @@ #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT) #define PAGE_MASK (~(PAGE_SIZE-1)) -/* We do define AT_SYSINFO_EHDR but don't use the gate mechanism */ -#define __HAVE_ARCH_GATE_AREA 1 - -#ifndef __ASSEMBLY__ - +/* + * The idmap and swapper page tables need some space reserved in the kernel + * image. Both require pgd, pud (4 levels only) and pmd tables to (section) + * map the kernel. With the 64K page configuration, swapper and idmap need to + * map to pte level. The swapper also maps the FDT (see __create_page_tables + * for more information). + */ #ifdef CONFIG_ARM64_64K_PAGES -#include <asm/pgtable-2level-types.h> +#define SWAPPER_PGTABLE_LEVELS (CONFIG_ARM64_PGTABLE_LEVELS) #else -#include <asm/pgtable-3level-types.h> +#define SWAPPER_PGTABLE_LEVELS (CONFIG_ARM64_PGTABLE_LEVELS - 1) #endif +#define SWAPPER_DIR_SIZE (SWAPPER_PGTABLE_LEVELS * PAGE_SIZE) +#define IDMAP_DIR_SIZE (SWAPPER_DIR_SIZE) + +#ifndef __ASSEMBLY__ + +#include <asm/pgtable-types.h> + extern void __cpu_clear_user_page(void *p, unsigned long user); extern void __cpu_copy_user_page(void *to, const void *from, unsigned long user); |